Rein CHK0583 Radiator Coolant Hose Kit - Lower - Primary Radiator To Thermostat

OE-Style Lower Radiator Hose Kit

Rein CHK0583 is a specific-fit radiator coolant hose kit for BMW cooling system service. It replaces the lower primary radiator-to-thermostat hose on select BMW 550i, 750i, and 650i applications with OE-style dimensions and thermoplastic quick-connect fittings.

The hose comes with the temperature sensor pre-installed, helping eliminate the need to reuse the original sensor during repair. This makes CHK0583 a direct replacement choice for BMW lower radiator hose service where the factory sensor location and hose routing must match the original layout.

Key Features

• Specific-fit radiator coolant hose kit for BMW cooling system repair
• Lower - Primary Radiator To Thermostat position
• Pre-installed temperature sensor included on the hose
• OE-quality construction with OEM-matched size and branch shape
• Thermoplastic quick-connect fittings for factory-style connection points
• No clamps included
• No protective sheathing included

Detailed Description

Rein CHK0583 is built for European vehicle cooling systems that require an OE-style replacement hose with the correct routing and sensor placement. It is engineered for BMW models including the 2011-2016 BMW 550i, 2009-2015 BMW 750i, and 2012-2014 BMW 650i, along with related xDrive and Gran Coupe applications listed in the fitment data. This part number, CHK0583, is designed to match the original hose assembly in shape, branch layout, and connector style for the lower primary radiator to thermostat circuit.

This part cross-references BMW 17127575427 and URO 13621433077 for the same application.

What It Helps Fix

• Coolant leaks at the lower radiator hose assembly
• Cracked or aged hose material from heat cycling
• Fault codes or service issues related to a worn temperature sensor
• Improper fit from non-OE hose routing or connector shape
• Repeat repairs caused by reusing an old sensor during hose replacement

Installation Notes

Install CHK0583 on the lower primary radiator to thermostat connection only on the listed BMW applications. Verify the hose routing, connector style, and sensor connection before installation. Because clamps are not included, reuse or replace any required clamps separately as needed for the vehicle.

For best results, inspect adjacent cooling system components such as the thermostat housing, radiator neck, and nearby hoses before reassembly. Confirm the vehicle’s year, model, and drivetrain match the fitment list exactly before ordering.

Quality Assurance

Rein positions this hose as an OE-quality replacement for European vehicles, with factory-matched dimensions and a pre-installed temperature sensor to reduce comeback risk from reused sensors. CHK0583 is built to follow the original manufacturer’s hose design for the specified BMW cooling system applications.